Nickel cobaltite (NiCo2O4) nanorods with spinel structure have been synthesized using a template-free hydrothermal method. The structure and morphology of the as-prepared nanorods were studied by x-ray diffraction analysis, field-emission scanning electron microscopy, and nitrogen adsorption–desorption measurements. Binder-free NiCo2O4 and NiCo2O4/carbon nanotube electrodes were fabricated via an electrophoretic deposition (EPD) procedure then subjected to electrochemical evaluation using cyclic voltammetry and galvanostatic charge–discharge measurements. The results revealed that the pseudocapacitive performance was enhanced by introducing CNTs into the NiCo2O4 electrode. Compared with the pure NiCo2O4 electrode, the composite electrode exhibited excellent energy storage performance with high specific capacitance of 1540 F g−1 at 3.5 A g−1, good rate performance with capacitance of 664 F g−1 even at high current density of 7.5 A g−1, and reasonable cycling performance (73% capacitance retention after 3000 cycles).

中文翻译：

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基于在 316L 不锈钢上电泳沉积 NiCo2O4/MWCNTs 纳米复合材料的高性能赝电容电极

使用无模板水热法合成了具有尖晶石结构的钴酸镍 (NiCo2O4) 纳米棒。通过X射线衍射分析、场发射扫描电子显微镜和氮吸附-解吸测量研究了所制备纳米棒的结构和形态。无粘合剂 NiCo2O4 和 NiCo2O4/碳纳米管电极通过电泳沉积 (EPD) 程序制造，然后使用循环伏安法和恒电流充放电测量进行电化学评估。结果表明，通过将碳纳米管引入 NiCo2O4 电极，赝电容性能得到增强。与纯 NiCo2O4 电极相比，复合电极表现出优异的储能性能，在 3.5 A g-1 时具有 1540 F g-1 的高比电容，